Culture vessel



FIG. 1 is a top front perspective view of a culture vessel showing our new design;

FIG. 2 is a top rear perspective view thereof;

FIG. 3 is a bottom front perspective view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The dashed lines in the Figures show portions of the culture vessel which form no part of the claimed design. 

CLAIM The ornamental design for a culture vessel, as shown and described. 